J/ApJ/850/122ivo://CDS.VizieR/J/ApJ/850/122doi:10.26093/cds/vizier.18500122CDSHahn M.Muller A.Savin D.W.2018-09-26T14:48:03Z2018-07-24T13:07:28ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsastronomical-reference-materialsWe compiled a set of electron-impact multiple-ionization (EIMI) cross section for astrophysically relevant ions. EIMIs can have a significant effect on the ionization balance of non-equilibrium plasmas. For example, it can be important if there is a rapid change in the electron temperature or if there is a non-thermal electron energy distribution, such as a kappa distribution. Cross section for EIMI are needed in order to account for these processes in plasma modeling and for spectroscopic interpretation. Here, we describe our comparison of proposed semiempirical formulae to available experimental EIMI cross-section data. Based on this comparison, we interpolated and extrapolated fitting parameters to systems that have not yet been measured. A tabulation of the fit parameters is provided for 3466 EIMI cross sections and the associated Maxwellian plasma rate coefficients. We also highlight some outstanding issues that remain to be resolved.2017ApJ...850..122Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/850/122CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/97/443 : Fluorescence for Be to Zn (Kaastra+ 1993)J/A+A/410/359 : Radiative and Auger decay for Fe II-Fe IX (Palmeri+, 2003)J/A+A/414/377 : FeX-FeXVII fine-structure K-vacancy levels (Mendoza+, 2004)J/ApJS/167/343 : Plasma Recombination rate coefficients (Bryans+, 2006)J/A+A/466/771 : Ionization rate coefficients for elements H-Zn (Dere+, 2007)J/ApJS/185/477 : N K-shell photoabsorption (Garcia+, 2009)J/A+A/525/A59 : Atomic data for Al ions (Palmeri+, 2011)J/ApJ/760/80 : Fe^9+^ and Fe^10+^ cross-section measurements (Hahn+, 2012)J/A+A/543/A44 : Atomic data for iron peak & light odd-Z ions (Palmeri+, 2012)J/ApJ/767/47 : Fe^13+^, Fe^16+^, Fe^17+^ cross-section measures (Hahn+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/850/122https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/850/122http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/850/122https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/850/122https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/850/122http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/850/122GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/850/122/refsReferencesCommCommentmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference code (Author and year)meta.note;meta.maincharprimaryBibCodeADS bibcode of the reference if anymeta.bib.bibcodecharJ/ApJ/850/122/table1Experimental EIMI data sourcesSeqSequencephys.atmol.ionStagecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOrder[2/7] Orderphys.atmolintIonAtom or Ionphys.atmol.ionStageRefReference (see refs.dat file)meta.ref;pos.framecharCommCommentmeta.notecharJ/ApJ/850/122/table2Fitting formulae for EIMI cross sectionsEq[1/7] equationmeta.idintqf[2/30] final charge statestat.paramintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintZ[2/30] nuclear chargephys.atmol.numberintqi[0/28] initial charge statestat.paramintIth[17.9/24254] ionization thresholdeVinstr.sensitivity;phys.atmol.ionizationdoublef[0/15] f fitting parameterstat.fit.paramdoublep0[0/400.2] p0 fitting parameterstat.fit.paramdoublep1[0/30] p1 fitting parameterstat.fit.paramfloatp2[0/2] p2 fitting parameterstat.fit.paramfloatp3[-19.7/1] p3 fitting parameterstat.fit.paramfloatp4[0/11.7] p4 fitting parameterstat.fit.paramfloatJ/ApJ/850/122/table5Fitting parameters for Maxwellian rate coefficientsqf[2/30] final charge statestat.paramintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintZ[2/30] nuclear chargephys.atmol.numberintqi[0/28] initial charge statestat.paramintEth[17.9/24254] energy thresholdeVphys.energy;phys.atmol.ionizationdoublea0[-0.1/32] a0 fitting parameterstat.paramdoublea1[0/426] a1 fitting parameterstat.paramdoublea2[-3090.3/1.8] a2 fitting parameterstat.paramdoublea3[-7.3/11869.4] a3 fitting parameterstat.paramdoublea4[-23017.3/13] a4 fitting parameterstat.paramdoublea5[-11.1/22040.7] a5 fitting parameterstat.paramdoublea6[-8285/619.4] a6 fitting parameterstat.paramdoublea7[-483.7/0.4] a7 fitting parameterstat.paramdoubleerr[0/0.2] maximum relative error of fitstat.error;stat.maxdouble